Recommendation for an Air Quality Standard for Carbon Monoxide

21. The Panel recommend an Air Quality Standard for carbon monoxide in the United Kingdom of 10 ppm, measured as a running 8 - hour average.
22. This recommendation is intended to limit the exposure of the population, including individuals who may be particularly susceptible, to levels at which harm is unlikely to occur. The Panel note however that, in general, smokers will have elevated levels of carboxyhaemoglobin and will not be influenced by additional exposure to carbon monoxide in ambient air. It is intended that techniques for monitoring the Standard be consistent with those of the Department of the Environment's national carbon monoxide monitoring networks.